CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) Share data in Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating Revenues:
Electric Domestic Regulated Revenue	$ 678,000,000	$ 583,000,000
Regulated Operating Revenue, Gas	458,000,000	382,000,000
Gas-nonregulated	454,000,000	346,000,000
Regulated and Unregulated Operating Revenue	1,590,000,000	1,311,000,000
Operating Expenses [Abstract]
Fuel used in electric generation	212,000,000	186,000,000
Purchased power	25,000,000	7,000,000
Gas purchased for resale	670,000,000	501,000,000
Other operation and maintenance	180,000,000	176,000,000
Depreciation and amortization	95,000,000	93,000,000
Other taxes	58,000,000	55,000,000
Total Operating Expenses	1,240,000,000	1,018,000,000
Operating Income	350,000,000	293,000,000
Other Income (Expense):
Interest Expense	(76,000,000)	(75,000,000)
Other income	15,000,000	13,000,000
Other expenses	(14,000,000)	(12,000,000)
Allowance for equity funds used during construction	7,000,000	4,000,000
Total Other Expense	(68,000,000)	(70,000,000)
Income Before Income Tax Expense	282,000,000	223,000,000
Income Tax Expense	89,000,000	72,000,000
Income Available to Common Shareholders	193,000,000	151,000,000
Per Common Share Data
Basic Earnings Per Share of Common Stock (in dollars per share)	$ 1.37	$ 1.13
Diluted Earnings Per Share of Common Stock (in dollars per share)	$ 1.37	$ 1.11
Weighted Average Common Shares Outstanding (millions)
Weighted Average Number of Shares Outstanding, Basic	141.1	134.4
Weighted Average Number of Shares Outstanding, Diluted	141.1	136.1
Dividends Declared Per Share of Common Stock (in dollars per share)	$ 0.5250	$ 0.5075
SCEG
Operating Revenues:
Electric Domestic Regulated Revenue	680,000,000	585,000,000
Regulated Operating Revenue, Gas	179,000,000	143,000,000
Regulated Operating Revenue	859,000,000	728,000,000
Operating Expenses [Abstract]
Fuel used in electric generation	214,000,000	188,000,000
Purchased power	25,000,000	7,000,000
Gas purchased for resale	109,000,000	77,000,000
Other operation and maintenance	142,000,000	138,000,000
Depreciation and amortization	78,000,000	77,000,000
Other taxes	52,000,000	50,000,000
Total Operating Expenses	620,000,000	537,000,000
Operating Income	239,000,000	191,000,000
Other Income (Expense):
Interest Expense	(56,000,000)	(55,000,000)
Other income	3,000,000	0
Other expenses	(6,000,000)	(4,000,000)
Allowance for equity funds used during construction	5,000,000	4,000,000
Total Other Expense	(54,000,000)	(55,000,000)
Income Before Income Tax Expense	185,000,000	136,000,000
Income Tax Expense	59,000,000	44,000,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	126,000,000	92,000,000
Net Income (Loss) Attributable to Noncontrolling Interest	(3,000,000)	(3,000,000)
Net Income (Loss) Attributable to Parent	123,000,000	89,000,000
Weighted Average Common Shares Outstanding (millions)
Dividends, Common Stock, Cash	$ 64,000,000	$ 64,000,000